Former Owner
- Pietro Giometti1
- Pietro Millini1
- Pietro Odescalchi1
- Pius XI1
- Placida Mahl1
- Poblet Monastery1
- Poor Clares1
- Pugliese1
- Purchased ca. 2000 from a book dealer.1
- Québriac family1
- R. A. Godwin-Austen1
- R. F. Pain1
- R. H. Fenn1
- R. J. Bunck1
- RR Donnelley1
- Rabbinical Seminary Vienna1
- Raitenhaslach Cistercian Abbey1
- Ralph Verney, 1st Earl Verney1
- Ramón de Mesonero Romanos1
- Raphael de Mediolano1